I (humbly) disagree on that.
Although you are right...
From a sailing efficiency perspective it is better to observe the VMG and trim for it. It is much harder to observe the TTG and trim for it since TTG is (hopefully) decreasing.
It would be nice to have the possibility to view VMG in OpenCPN
. It would also be nice with a wind arrow showing the TWD (True wind direction) in the plot, it would make it possible to judge whether it is possible to pass an island, a ground or a navigation
mark by observing the boat and the wind arrow on the chart.
My feature request would be:
1. To have TTG as the time to the next waypoint - as it is.
2. To have a new variable: TTTG - TotalTimeToGo- for the time to the end of the route.
I can not test this right now - I dont have any way of feeding NMEA
to OpenCPN. If you create a route and Activate it. When you click the Route/Leg icon, will the TTG shift from showing the time left to the the next waypoint and time to the last waypoint in the route or not?
If it does change it would be more clear if the name changed to "TTTG".
In my case I have the VMG through my instrument system and the response will probably always be faster than through the computer/OpenCPN. (This depends mainly on the update frequency for information from the log/Wind transducer, it will always be a tad slow using NMEA
Regardless of this it would still be nice to be able to observe VMG and WCV in OpenCPN, if possible.